Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11146061 | Overvoltage protection device with thermal overload protection device | Christian Birkholz, Steffen Pfoertner | 2021-10-12 |
| 8072728 | Overvoltage protection device | Gerhard Wolff, Martin Wetter, Frank Welzel | 2011-12-06 |
| 7335029 | Circuit board with shielded connection | Peter Bäckeralf, Frank Welzel | 2008-02-26 |